Wood-refuse incinerator.



1.T.STODDARD.

WOOD REFUSE INCINERATOR, APPLICATION FILED MAY 24, I9I5.

l, 171,005. Patented Feb. 8, 1916.

Pfg 2.

JAMES T. STODDARD, OF PORTLAND, OREGON.

WOOD-REFUSE INCINERATOR.

' Application filed May 24, 1915. `Serial No. 30,064.

To all whom it may concern Be it known that I, JAMES T. STODDARD,

ia citizen of the UnitedStates, residing at Portland, in the county of Multnomah and State of Oregon, have invented a new and useful Improvement inWVood-R'efuse In-` cinerators, of which the. following is a specification, reference panying drawings.

My invention relates to that'class of devices used to burn the sawdustv and other wood-refuse taken yfrom-'mills or factories engaged in making wood` products.

Theobject of my invention is to 'provide a device ofv this kind in which the construction is arranged to produce a circulation of cool air upon the inside andoutside of its thin metal walls and thus preserve them against destruction from the intense heat developed in burning refuse of that kind, also to secure the best possible draft to the material burned. I attain these objects, as well as other advantages, by the construction, combination and arrangement of being hadfto the accomvparts illustrated in the accompanying drawings, which form a part hereof.

Figure 1 isa side elevation with parts broken away tion therein. .f Fig. 2 is a transverse half section on the line 2-2 of Fig. 1. Fig. 3 isl a plan view of top, showing spark arrester. Fig. l is a cross section of a leg on the line 4*-4: of Fi 1. Fig. 5 is a cross section of le on the Aline 5-5 of Fig. 3,' showing attac iment of spark' arrester.

Like letters and numerals .refer to like.l

parts throughout the views.

A is the conical body ofthe incinerator.

B isa concrete circular fire-pit within the end of the wall y9 a suitable distance. A,v conveyer 11 is arrangd toeXtend from a source of material supply to and within the body A at a suitable` height therein.

spark arrester 12 is rigidly secured over the Specification of Letters Patent.

'top-f the body A. l by suitably curved below it transversely from the uppery ends `lagration can and showing sectional eleva-4 .shape of the body, duced which makes an Y dra-ft. It will be furtherv seen that the cold In the body A are upright legs 6, of thin- 'attesti Patented rebaieic.

It is supported thereon lateral rods 13 extending of the legs 6.

within the body Atheerular pa B is' arranged so that its vertical wall shall eX- tend a suitable height above-the lower end Y' of the body wall 9 and also to allow a suitable space between the two walls laterally. The fire-pit B is arranged so that its bottom l 14 shall be at a suitable height with relation to the pit wall and body wall 9. Below and within the lire-pit B is anlash pit 15 eX- te'ndingflaterally across the fire-pit B. The

ash pit has a fire grate 16.

Material 17 is shown inV position for incineration. y

device should be setup in a suitable "location near a refuse material supply place so that. the material can be easily conveyed to the incinerator and the danger from conalso be minlmized.

` A door may be and usually is provided in va convenient position in the bodyv so that the operator can enter the'pit and start a v lire, also to remove' ashes.

started, sawdust and refuse wood material "is sent through the conveyer and deposited 'in the re-pit and the incineration is thereafter carried on indefinitely. A draft enters the vfire-pit from below through the ash pit, and also there is an abundant draft kfrom the sides to insure speedy and com-p kplete incineration of everything deposited.

, It will be seen that, owing to the conical air enters from below, and, while supplying all required for combustion, it also follows upward along the interior of the wall, being directed against it primarily by the opposing outer surface of the fire-'pit wall. The upper portion' of the body being heated, the air of course naturally rises and the cold air flows constantly over as-shown by the arrows. On the outersur face of the body` it will be noted that asr each yportion becomes heated the air rises therefrom and cold airconstantly rushes against all partsof the outer surface as indicated by the arrows. This, and the thin metal in the wall, insure a temperature so low inthe body and the legs thatthey will never fuse or burn out. In any event the life of the body is conserved indefinitely. I prefer to a chimney effect is pro-- excellent" combustion When the fire is v the inner surface e conical body shell A use corrugated metal in the wall as it cools quickly and allows for expansion and con traction. For the same reason l use channel iron in the legs. The wall being secured on the linside of the frame protects the latter from the heat. The channels in the legs facing inward also assist in the passage of the cooling drafts upward.

The cheapness of construction, positive cooling arrangement, and effective drafts make my device .highly successful both as to its management and'cost of operation. Its durable quality is also an important feature in cost of maintenance. lVhile the fire-pit is illustrated as circular, it may also beef polygonal or other suitable form.

The spark arrester is easily secured on a device of this form and perfectly prevents all danger of setting out res.

Having thus described my invention, I claiml. An incinerator of thel character described, comprising a thin metal upright with openings at each Copies of this patent may be obtained for ofvits ends and open throughout its' length, means to support said body at a suitable height, a circular fire-pit within the body, having a vertical pit wall the upper end of which is arranged at a suitable distance laterally from the body shell and also at a suitable height above its lower end, substantially as described.

2; An incinerator of the character described, comprising an upright body with openings at each of its ends and open throughout its length, said body being composed of a frame and a thin metal wall on the inside of the frame, means to support the body at a suitable height, a fire-pit within the body, having a vertical pit wall the upper end of which is arranged at a suitable distance laterally from the body wall land also at a suitable height above its lower end, substantially as described.

JAMES T. STODDARD. litnesses J. C. STRNG,

H. A. WILLIAMS.

ve cents each, by addressing the Commissioner of Patents. Washington, D. C. 

